    //uint8_t LED_Pin = D4;       // declare LED pin on NodeMCU Dev Kit
    uint8_t LED_R = 5;
    uint8_t LED_G = 4;
    uint8_t LED_B = 3;
    void setup() {
    //pinMode(LED_Pin, OUTPUT);   // Initialize the LED pin as an output
    pinMode(LED_R, OUTPUT);
    pinMode(LED_G, OUTPUT);
    pinMode(LED_B, OUTPUT);
    }
    void loop() {
    //digitalWrite(LED_Pin, LOW);// Turn the LED on
    digitalWrite(LED_R, LOW);
    digitalWrite(LED_G, LOW);
    digitalWrite(LED_B, LOW);
    delay(1000);                // Wait for a second
    //digitalWrite(LED_Pin, HIGH);// Turn the LED off
    digitalWrite(LED_R, HIGH);
    digitalWrite(LED_G, HIGH);
    digitalWrite(LED_B, HIGH);
    delay(1000);                // Wait for a second
    }
